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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright (c) 2009 Kathryn Huxtable and Kenneth Orr.</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * This file is part of the SeaGlass Pluggable Look and Feel.</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * Licensed under the Apache License, Version 2.0 (the "License");</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> * you may not use this file except in compliance with the License.</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> * You may obtain a copy of the License at</em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> *     <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> * See the License for the specific language governing permissions and</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment"> * limitations under the License.</em>
<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment"> * $Id: ImageCache.java 1595 2011-08-09 20:33:48Z rosstauscher@gmx.de $</em>
<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">package</strong> com.seaglasslookandfeel.util;
<a class="jxr_linenumber" name="21" href="#21">21</a>  
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.awt.GraphicsConfiguration;
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.awt.Image;
<a class="jxr_linenumber" name="24" href="#24">24</a>  
<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.lang.ref.ReferenceQueue;
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> java.lang.ref.SoftReference;
<a class="jxr_linenumber" name="27" href="#27">27</a>  
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> java.util.Arrays;
<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> java.util.Iterator;
<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> java.util.LinkedHashMap;
<a class="jxr_linenumber" name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> java.util.Map;
<a class="jxr_linenumber" name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.locks.ReadWriteLock;
<a class="jxr_linenumber" name="33" href="#33">33</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.locks.ReentrantReadWriteLock;
<a class="jxr_linenumber" name="34" href="#34">34</a>  
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> * ImageCache - A fixed pixel count sized cache of Images keyed by arbitrary set</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> * of arguments. All images are held with SoftReferences so they will be dropped</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> * by the GC if heap memory gets tight. When our size hits max pixel count least</em>
<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_javadoccomment"> * recently requested images are removed first.</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;Based on Nimbus's ImageCache by Jasper Potts. This was package local.&lt;/p&gt;</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../com/seaglasslookandfeel/util/ImageCache.html">ImageCache</a> {
<a class="jxr_linenumber" name="45" href="#45">45</a>  
<a class="jxr_linenumber" name="46" href="#46">46</a>      <em class="jxr_comment">// Singleton Instance</em>
<a class="jxr_linenumber" name="47" href="#47">47</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../com/seaglasslookandfeel/util/ImageCache.html">ImageCache</a> instance = <strong class="jxr_keyword">new</strong> <a href="../../../com/seaglasslookandfeel/util/ImageCache.html">ImageCache</a>();
<a class="jxr_linenumber" name="48" href="#48">48</a>  
<a class="jxr_linenumber" name="49" href="#49">49</a>      <em class="jxr_comment">// Ordered Map keyed by args hash, ordered by most recent accessed entry.</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> LinkedHashMap&lt;Integer, PixelCountSoftReference&gt; map = <strong class="jxr_keyword">new</strong> LinkedHashMap&lt;Integer, PixelCountSoftReference&gt;(16, 0.75f,
<a class="jxr_linenumber" name="51" href="#51">51</a>                                                                                                                              <strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="52" href="#52">52</a>  
<a class="jxr_linenumber" name="53" href="#53">53</a>      <em class="jxr_comment">// Maximum number of pixels to cache, this is used if maxCount</em>
<a class="jxr_linenumber" name="54" href="#54">54</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> maxPixelCount;
<a class="jxr_linenumber" name="55" href="#55">55</a>  
<a class="jxr_linenumber" name="56" href="#56">56</a>      <em class="jxr_comment">// Maximum cached image size in pxiels</em>
<a class="jxr_linenumber" name="57" href="#57">57</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> maxSingleImagePixelSize;
<a class="jxr_linenumber" name="58" href="#58">58</a>  
<a class="jxr_linenumber" name="59" href="#59">59</a>      <em class="jxr_comment">// The current number of pixels stored in the cache</em>
<a class="jxr_linenumber" name="60" href="#60">60</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> currentPixelCount = 0;
<a class="jxr_linenumber" name="61" href="#61">61</a>  
<a class="jxr_linenumber" name="62" href="#62">62</a>      <em class="jxr_comment">// Lock for concurrent access to map</em>
<a class="jxr_linenumber" name="63" href="#63">63</a>      <strong class="jxr_keyword">private</strong> ReadWriteLock lock = <strong class="jxr_keyword">new</strong> ReentrantReadWriteLock();
<a class="jxr_linenumber" name="64" href="#64">64</a>  
<a class="jxr_linenumber" name="65" href="#65">65</a>      <em class="jxr_comment">// Reference queue for tracking lost softreferences to images in the cache</em>
<a class="jxr_linenumber" name="66" href="#66">66</a>      <strong class="jxr_keyword">private</strong> ReferenceQueue&lt;Image&gt; referenceQueue = <strong class="jxr_keyword">new</strong> ReferenceQueue&lt;Image&gt;();
<a class="jxr_linenumber" name="67" href="#67">67</a>  
<a class="jxr_linenumber" name="68" href="#68">68</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="69" href="#69">69</a>  <em class="jxr_javadoccomment">     * Creates a new ImageCache object.</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="71" href="#71">71</a>      <strong class="jxr_keyword">public</strong> <a href="../../../com/seaglasslookandfeel/util/ImageCache.html">ImageCache</a>() {
<a class="jxr_linenumber" name="72" href="#72">72</a>          <strong class="jxr_keyword">this</strong>.maxPixelCount           = (8 * 1024 * 1024) / 4; <em class="jxr_comment">// 8Mb of pixels</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>          <strong class="jxr_keyword">this</strong>.maxSingleImagePixelSize = 300 * 300;
<a class="jxr_linenumber" name="74" href="#74">74</a>      }
<a class="jxr_linenumber" name="75" href="#75">75</a>  
<a class="jxr_linenumber" name="76" href="#76">76</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="77" href="#77">77</a>  <em class="jxr_javadoccomment">     * Creates a new ImageCache object.</em>
<a class="jxr_linenumber" name="78" href="#78">78</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="79" href="#79">79</a>  <em class="jxr_javadoccomment">     * @param maxPixelCount           the maximum pixel count.</em>
<a class="jxr_linenumber" name="80" href="#80">80</a>  <em class="jxr_javadoccomment">     * @param maxSingleImagePixelSize the maximum single image pixel size.</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="82" href="#82">82</a>      <strong class="jxr_keyword">public</strong> <a href="../../../com/seaglasslookandfeel/util/ImageCache.html">ImageCache</a>(<strong class="jxr_keyword">int</strong> maxPixelCount, <strong class="jxr_keyword">int</strong> maxSingleImagePixelSize) {
<a class="jxr_linenumber" name="83" href="#83">83</a>          <strong class="jxr_keyword">this</strong>.maxPixelCount           = maxPixelCount;
<a class="jxr_linenumber" name="84" href="#84">84</a>          <strong class="jxr_keyword">this</strong>.maxSingleImagePixelSize = maxSingleImagePixelSize;
<a class="jxr_linenumber" name="85" href="#85">85</a>      }
<a class="jxr_linenumber" name="86" href="#86">86</a>  
<a class="jxr_linenumber" name="87" href="#87">87</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="88" href="#88">88</a>  <em class="jxr_javadoccomment">     * Get static singleton instance.</em>
<a class="jxr_linenumber" name="89" href="#89">89</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="90" href="#90">90</a>  <em class="jxr_javadoccomment">     * @return the singleton image cache.</em>
<a class="jxr_linenumber" name="91" href="#91">91</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="92" href="#92">92</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../com/seaglasslookandfeel/util/ImageCache.html">ImageCache</a> getInstance() {
<a class="jxr_linenumber" name="93" href="#93">93</a>          <strong class="jxr_keyword">return</strong> instance;
<a class="jxr_linenumber" name="94" href="#94">94</a>      }
<a class="jxr_linenumber" name="95" href="#95">95</a>  
<a class="jxr_linenumber" name="96" href="#96">96</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="97" href="#97">97</a>  <em class="jxr_javadoccomment">     * Clear the cache.</em>
<a class="jxr_linenumber" name="98" href="#98">98</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="99" href="#99">99</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> flush() {
<a class="jxr_linenumber" name="100" href="#100">100</a>         lock.readLock().lock();
<a class="jxr_linenumber" name="101" href="#101">101</a> 
<a class="jxr_linenumber" name="102" href="#102">102</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="103" href="#103">103</a>             map.clear();
<a class="jxr_linenumber" name="104" href="#104">104</a>         } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="105" href="#105">105</a>             lock.readLock().unlock();
<a class="jxr_linenumber" name="106" href="#106">106</a>         }
<a class="jxr_linenumber" name="107" href="#107">107</a>     }
<a class="jxr_linenumber" name="108" href="#108">108</a> 
<a class="jxr_linenumber" name="109" href="#109">109</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="110" href="#110">110</a> <em class="jxr_javadoccomment">     * Check if the image size is to big to be stored in the cache.</em>
<a class="jxr_linenumber" name="111" href="#111">111</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="112" href="#112">112</a> <em class="jxr_javadoccomment">     * @param  w The image width</em>
<a class="jxr_linenumber" name="113" href="#113">113</a> <em class="jxr_javadoccomment">     * @param  h The image height</em>
<a class="jxr_linenumber" name="114" href="#114">114</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="115" href="#115">115</a> <em class="jxr_javadoccomment">     * @return True if the image size is less than max</em>
<a class="jxr_linenumber" name="116" href="#116">116</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="117" href="#117">117</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isImageCachable(<strong class="jxr_keyword">int</strong> w, <strong class="jxr_keyword">int</strong> h) {
<a class="jxr_linenumber" name="118" href="#118">118</a>         <strong class="jxr_keyword">return</strong> (w * h) &lt; maxSingleImagePixelSize;
<a class="jxr_linenumber" name="119" href="#119">119</a>     }
<a class="jxr_linenumber" name="120" href="#120">120</a> 
<a class="jxr_linenumber" name="121" href="#121">121</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="122" href="#122">122</a> <em class="jxr_javadoccomment">     * Get the cached image for given keys</em>
<a class="jxr_linenumber" name="123" href="#123">123</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="124" href="#124">124</a> <em class="jxr_javadoccomment">     * @param  config The graphics configuration, needed if cached image is a</em>
<a class="jxr_linenumber" name="125" href="#125">125</a> <em class="jxr_javadoccomment">     *                Volatile Image. Used as part of cache key</em>
<a class="jxr_linenumber" name="126" href="#126">126</a> <em class="jxr_javadoccomment">     * @param  w      The image width, used as part of cache key</em>
<a class="jxr_linenumber" name="127" href="#127">127</a> <em class="jxr_javadoccomment">     * @param  h      The image height, used as part of cache key</em>
<a class="jxr_linenumber" name="128" href="#128">128</a> <em class="jxr_javadoccomment">     * @param  args   Other arguments to use as part of the cache key</em>
<a class="jxr_linenumber" name="129" href="#129">129</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="130" href="#130">130</a> <em class="jxr_javadoccomment">     * @return Returns the cached Image, or null there is no cached image for</em>
<a class="jxr_linenumber" name="131" href="#131">131</a> <em class="jxr_javadoccomment">     *         key</em>
<a class="jxr_linenumber" name="132" href="#132">132</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="133" href="#133">133</a>     <strong class="jxr_keyword">public</strong> Image getImage(GraphicsConfiguration config, <strong class="jxr_keyword">int</strong> w, <strong class="jxr_keyword">int</strong> h, Object... args) {
<a class="jxr_linenumber" name="134" href="#134">134</a>         lock.readLock().lock();
<a class="jxr_linenumber" name="135" href="#135">135</a> 
<a class="jxr_linenumber" name="136" href="#136">136</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="137" href="#137">137</a>             <a href="../../../com/seaglasslookandfeel/util/ImageCache.html">PixelCountSoftReference</a> ref = map.get(hash(config, w, h, args));
<a class="jxr_linenumber" name="138" href="#138">138</a> 
<a class="jxr_linenumber" name="139" href="#139">139</a>             <em class="jxr_comment">// check reference has not been lost and the key truly matches, in</em>
<a class="jxr_linenumber" name="140" href="#140">140</a>             <em class="jxr_comment">// case of false positive hash match</em>
<a class="jxr_linenumber" name="141" href="#141">141</a>             <strong class="jxr_keyword">if</strong> (ref != <strong class="jxr_keyword">null</strong> &amp;&amp; ref.equals(config, w, h, args)) {
<a class="jxr_linenumber" name="142" href="#142">142</a>                 <strong class="jxr_keyword">return</strong> ref.get();
<a class="jxr_linenumber" name="143" href="#143">143</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="144" href="#144">144</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="145" href="#145">145</a>             }
<a class="jxr_linenumber" name="146" href="#146">146</a>         } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="147" href="#147">147</a>             lock.readLock().unlock();
<a class="jxr_linenumber" name="148" href="#148">148</a>         }
<a class="jxr_linenumber" name="149" href="#149">149</a>     }
<a class="jxr_linenumber" name="150" href="#150">150</a> 
<a class="jxr_linenumber" name="151" href="#151">151</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="152" href="#152">152</a> <em class="jxr_javadoccomment">     * Sets the cached image for the specified constraints.</em>
<a class="jxr_linenumber" name="153" href="#153">153</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="154" href="#154">154</a> <em class="jxr_javadoccomment">     * @param  image  The image to store in cache</em>
<a class="jxr_linenumber" name="155" href="#155">155</a> <em class="jxr_javadoccomment">     * @param  config The graphics configuration, needed if cached image is a</em>
<a class="jxr_linenumber" name="156" href="#156">156</a> <em class="jxr_javadoccomment">     *                Volatile Image. Used as part of cache key</em>
<a class="jxr_linenumber" name="157" href="#157">157</a> <em class="jxr_javadoccomment">     * @param  w      The image width, used as part of cache key</em>
<a class="jxr_linenumber" name="158" href="#158">158</a> <em class="jxr_javadoccomment">     * @param  h      The image height, used as part of cache key</em>
<a class="jxr_linenumber" name="159" href="#159">159</a> <em class="jxr_javadoccomment">     * @param  args   Other arguments to use as part of the cache key</em>
<a class="jxr_linenumber" name="160" href="#160">160</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="161" href="#161">161</a> <em class="jxr_javadoccomment">     * @return true if the image could be cached or false if the image is too</em>
<a class="jxr_linenumber" name="162" href="#162">162</a> <em class="jxr_javadoccomment">     *         big</em>
<a class="jxr_linenumber" name="163" href="#163">163</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="164" href="#164">164</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> setImage(Image image, GraphicsConfiguration config, <strong class="jxr_keyword">int</strong> w, <strong class="jxr_keyword">int</strong> h, Object... args) {
<a class="jxr_linenumber" name="165" href="#165">165</a>         <strong class="jxr_keyword">if</strong> (!isImageCachable(w, h))
<a class="jxr_linenumber" name="166" href="#166">166</a>             <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="167" href="#167">167</a> 
<a class="jxr_linenumber" name="168" href="#168">168</a>         <strong class="jxr_keyword">int</strong> hash = hash(config, w, h, args);
<a class="jxr_linenumber" name="169" href="#169">169</a> 
<a class="jxr_linenumber" name="170" href="#170">170</a>         lock.writeLock().lock();
<a class="jxr_linenumber" name="171" href="#171">171</a> 
<a class="jxr_linenumber" name="172" href="#172">172</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="173" href="#173">173</a>             <a href="../../../com/seaglasslookandfeel/util/ImageCache.html">PixelCountSoftReference</a> ref = map.get(hash);
<a class="jxr_linenumber" name="174" href="#174">174</a> 
<a class="jxr_linenumber" name="175" href="#175">175</a>             <em class="jxr_comment">// check if currently in map</em>
<a class="jxr_linenumber" name="176" href="#176">176</a>             <strong class="jxr_keyword">if</strong> (ref != <strong class="jxr_keyword">null</strong> &amp;&amp; ref.get() == image) {
<a class="jxr_linenumber" name="177" href="#177">177</a>                 <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="178" href="#178">178</a>             }
<a class="jxr_linenumber" name="179" href="#179">179</a> 
<a class="jxr_linenumber" name="180" href="#180">180</a>             <em class="jxr_comment">// clear out old</em>
<a class="jxr_linenumber" name="181" href="#181">181</a>             <strong class="jxr_keyword">if</strong> (ref != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="182" href="#182">182</a>                 currentPixelCount -= ref.pixelCount;
<a class="jxr_linenumber" name="183" href="#183">183</a>                 map.remove(hash);
<a class="jxr_linenumber" name="184" href="#184">184</a>             }
<a class="jxr_linenumber" name="185" href="#185">185</a> 
<a class="jxr_linenumber" name="186" href="#186">186</a>             <em class="jxr_comment">// add new image to pixel count</em>
<a class="jxr_linenumber" name="187" href="#187">187</a>             <strong class="jxr_keyword">int</strong> newPixelCount = image.getWidth(<strong class="jxr_keyword">null</strong>) * image.getHeight(<strong class="jxr_keyword">null</strong>);
<a class="jxr_linenumber" name="188" href="#188">188</a> 
<a class="jxr_linenumber" name="189" href="#189">189</a>             currentPixelCount += newPixelCount;
<a class="jxr_linenumber" name="190" href="#190">190</a> 
<a class="jxr_linenumber" name="191" href="#191">191</a>             <em class="jxr_comment">// clean out lost references if not enough space</em>
<a class="jxr_linenumber" name="192" href="#192">192</a>             <strong class="jxr_keyword">if</strong> (currentPixelCount &gt; maxPixelCount) {
<a class="jxr_linenumber" name="193" href="#193">193</a> 
<a class="jxr_linenumber" name="194" href="#194">194</a>                 <strong class="jxr_keyword">while</strong> ((ref = (PixelCountSoftReference) referenceQueue.poll()) != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="195" href="#195">195</a> 
<a class="jxr_linenumber" name="196" href="#196">196</a>                     <em class="jxr_comment">// reference lost</em>
<a class="jxr_linenumber" name="197" href="#197">197</a>                     map.remove(ref.hash);
<a class="jxr_linenumber" name="198" href="#198">198</a>                     currentPixelCount -= ref.pixelCount;
<a class="jxr_linenumber" name="199" href="#199">199</a>                 }
<a class="jxr_linenumber" name="200" href="#200">200</a>             }
<a class="jxr_linenumber" name="201" href="#201">201</a> 
<a class="jxr_linenumber" name="202" href="#202">202</a>             <em class="jxr_comment">// remove old items till there is enough free space</em>
<a class="jxr_linenumber" name="203" href="#203">203</a>             <strong class="jxr_keyword">if</strong> (currentPixelCount &gt; maxPixelCount) {
<a class="jxr_linenumber" name="204" href="#204">204</a>                 Iterator&lt;Map.Entry&lt;Integer, PixelCountSoftReference&gt;&gt; mapIter = map.entrySet().iterator();
<a class="jxr_linenumber" name="205" href="#205">205</a> 
<a class="jxr_linenumber" name="206" href="#206">206</a>                 <strong class="jxr_keyword">while</strong> ((currentPixelCount &gt; maxPixelCount) &amp;&amp; mapIter.hasNext()) {
<a class="jxr_linenumber" name="207" href="#207">207</a>                     Map.Entry&lt;Integer, PixelCountSoftReference&gt; entry = mapIter.next();
<a class="jxr_linenumber" name="208" href="#208">208</a> 
<a class="jxr_linenumber" name="209" href="#209">209</a>                     mapIter.remove();
<a class="jxr_linenumber" name="210" href="#210">210</a>                     Image img = entry.getValue().get();
<a class="jxr_linenumber" name="211" href="#211">211</a> 
<a class="jxr_linenumber" name="212" href="#212">212</a>                     <strong class="jxr_keyword">if</strong> (img != <strong class="jxr_keyword">null</strong>)
<a class="jxr_linenumber" name="213" href="#213">213</a>                         img.flush();
<a class="jxr_linenumber" name="214" href="#214">214</a> 
<a class="jxr_linenumber" name="215" href="#215">215</a>                     currentPixelCount -= entry.getValue().pixelCount;
<a class="jxr_linenumber" name="216" href="#216">216</a>                 }
<a class="jxr_linenumber" name="217" href="#217">217</a>             }
<a class="jxr_linenumber" name="218" href="#218">218</a> 
<a class="jxr_linenumber" name="219" href="#219">219</a>             <em class="jxr_comment">// finaly put new in map</em>
<a class="jxr_linenumber" name="220" href="#220">220</a>             map.put(hash, <strong class="jxr_keyword">new</strong> <a href="../../../com/seaglasslookandfeel/util/ImageCache.html">PixelCountSoftReference</a>(image, referenceQueue, newPixelCount, hash, config, w, h, args));
<a class="jxr_linenumber" name="221" href="#221">221</a> 
<a class="jxr_linenumber" name="222" href="#222">222</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="223" href="#223">223</a>         } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="224" href="#224">224</a>             lock.writeLock().unlock();
<a class="jxr_linenumber" name="225" href="#225">225</a>         }
<a class="jxr_linenumber" name="226" href="#226">226</a>     }
<a class="jxr_linenumber" name="227" href="#227">227</a> 
<a class="jxr_linenumber" name="228" href="#228">228</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="229" href="#229">229</a> <em class="jxr_javadoccomment">     * Create a unique hash from all the input.</em>
<a class="jxr_linenumber" name="230" href="#230">230</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="231" href="#231">231</a> <em class="jxr_javadoccomment">     * @param  config the graphics configuration.</em>
<a class="jxr_linenumber" name="232" href="#232">232</a> <em class="jxr_javadoccomment">     * @param  w      the width.</em>
<a class="jxr_linenumber" name="233" href="#233">233</a> <em class="jxr_javadoccomment">     * @param  h      the height.</em>
<a class="jxr_linenumber" name="234" href="#234">234</a> <em class="jxr_javadoccomment">     * @param  args   the arguments for the image.</em>
<a class="jxr_linenumber" name="235" href="#235">235</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="236" href="#236">236</a> <em class="jxr_javadoccomment">     * @return the hash for the object instance.</em>
<a class="jxr_linenumber" name="237" href="#237">237</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="238" href="#238">238</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> hash(GraphicsConfiguration config, <strong class="jxr_keyword">int</strong> w, <strong class="jxr_keyword">int</strong> h, Object... args) {
<a class="jxr_linenumber" name="239" href="#239">239</a>         <strong class="jxr_keyword">int</strong> hash;
<a class="jxr_linenumber" name="240" href="#240">240</a> 
<a class="jxr_linenumber" name="241" href="#241">241</a>         hash = (config != <strong class="jxr_keyword">null</strong> ? config.hashCode() : 0);
<a class="jxr_linenumber" name="242" href="#242">242</a>         hash = 31 * hash + w;
<a class="jxr_linenumber" name="243" href="#243">243</a>         hash = 31 * hash + h;
<a class="jxr_linenumber" name="244" href="#244">244</a>         hash = 31 * hash + Arrays.deepHashCode(args);
<a class="jxr_linenumber" name="245" href="#245">245</a> 
<a class="jxr_linenumber" name="246" href="#246">246</a>         <strong class="jxr_keyword">return</strong> hash;
<a class="jxr_linenumber" name="247" href="#247">247</a>     }
<a class="jxr_linenumber" name="248" href="#248">248</a> 
<a class="jxr_linenumber" name="249" href="#249">249</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="250" href="#250">250</a> <em class="jxr_javadoccomment">     * Extended SoftReference that stores the pixel count even after the image</em>
<a class="jxr_linenumber" name="251" href="#251">251</a> <em class="jxr_javadoccomment">     * is lost.</em>
<a class="jxr_linenumber" name="252" href="#252">252</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="253" href="#253">253</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">class</strong> <a href="../../../com/seaglasslookandfeel/util/ImageCache.html">PixelCountSoftReference</a> <strong class="jxr_keyword">extends</strong> SoftReference&lt;Image&gt; {
<a class="jxr_linenumber" name="254" href="#254">254</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> pixelCount;
<a class="jxr_linenumber" name="255" href="#255">255</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> hash;
<a class="jxr_linenumber" name="256" href="#256">256</a> 
<a class="jxr_linenumber" name="257" href="#257">257</a>         <em class="jxr_comment">// key parts</em>
<a class="jxr_linenumber" name="258" href="#258">258</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> GraphicsConfiguration config;
<a class="jxr_linenumber" name="259" href="#259">259</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong>                   w;
<a class="jxr_linenumber" name="260" href="#260">260</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong>                   h;
<a class="jxr_linenumber" name="261" href="#261">261</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Object[]              args;
<a class="jxr_linenumber" name="262" href="#262">262</a> 
<a class="jxr_linenumber" name="263" href="#263">263</a>         <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="264" href="#264">264</a> <em class="jxr_javadoccomment">         * Creates a new PixelCountSoftReference object.</em>
<a class="jxr_linenumber" name="265" href="#265">265</a> <em class="jxr_javadoccomment">         *</em>
<a class="jxr_linenumber" name="266" href="#266">266</a> <em class="jxr_javadoccomment">         * @param referent   the image.</em>
<a class="jxr_linenumber" name="267" href="#267">267</a> <em class="jxr_javadoccomment">         * @param q          the reference queue.</em>
<a class="jxr_linenumber" name="268" href="#268">268</a> <em class="jxr_javadoccomment">         * @param pixelCount the pixel count.</em>
<a class="jxr_linenumber" name="269" href="#269">269</a> <em class="jxr_javadoccomment">         * @param hash       the hash.</em>
<a class="jxr_linenumber" name="270" href="#270">270</a> <em class="jxr_javadoccomment">         * @param config     the graphics configuration.</em>
<a class="jxr_linenumber" name="271" href="#271">271</a> <em class="jxr_javadoccomment">         * @param w          the width.</em>
<a class="jxr_linenumber" name="272" href="#272">272</a> <em class="jxr_javadoccomment">         * @param h          the height.</em>
<a class="jxr_linenumber" name="273" href="#273">273</a> <em class="jxr_javadoccomment">         * @param args       the arguments for the image.</em>
<a class="jxr_linenumber" name="274" href="#274">274</a> <em class="jxr_javadoccomment">         */</em>
<a class="jxr_linenumber" name="275" href="#275">275</a>         <strong class="jxr_keyword">public</strong> <a href="../../../com/seaglasslookandfeel/util/ImageCache.html">PixelCountSoftReference</a>(Image referent, ReferenceQueue&lt;? <strong class="jxr_keyword">super</strong> Image&gt; q, <strong class="jxr_keyword">int</strong> pixelCount, <strong class="jxr_keyword">int</strong> hash,
<a class="jxr_linenumber" name="276" href="#276">276</a>                 GraphicsConfiguration config, <strong class="jxr_keyword">int</strong> w, <strong class="jxr_keyword">int</strong> h, Object[] args) {
<a class="jxr_linenumber" name="277" href="#277">277</a>             <strong class="jxr_keyword">super</strong>(referent, q);
<a class="jxr_linenumber" name="278" href="#278">278</a>             <strong class="jxr_keyword">this</strong>.pixelCount = pixelCount;
<a class="jxr_linenumber" name="279" href="#279">279</a>             <strong class="jxr_keyword">this</strong>.hash       = hash;
<a class="jxr_linenumber" name="280" href="#280">280</a>             <strong class="jxr_keyword">this</strong>.config     = config;
<a class="jxr_linenumber" name="281" href="#281">281</a>             <strong class="jxr_keyword">this</strong>.w          = w;
<a class="jxr_linenumber" name="282" href="#282">282</a>             <strong class="jxr_keyword">this</strong>.h          = h;
<a class="jxr_linenumber" name="283" href="#283">283</a>             <strong class="jxr_keyword">this</strong>.args       = args;
<a class="jxr_linenumber" name="284" href="#284">284</a>         }
<a class="jxr_linenumber" name="285" href="#285">285</a> 
<a class="jxr_linenumber" name="286" href="#286">286</a>         <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="287" href="#287">287</a> <em class="jxr_javadoccomment">         * Tests for equality.</em>
<a class="jxr_linenumber" name="288" href="#288">288</a> <em class="jxr_javadoccomment">         *</em>
<a class="jxr_linenumber" name="289" href="#289">289</a> <em class="jxr_javadoccomment">         * @param  config the graphics configuration.</em>
<a class="jxr_linenumber" name="290" href="#290">290</a> <em class="jxr_javadoccomment">         * @param  w      the width.</em>
<a class="jxr_linenumber" name="291" href="#291">291</a> <em class="jxr_javadoccomment">         * @param  h      the height.</em>
<a class="jxr_linenumber" name="292" href="#292">292</a> <em class="jxr_javadoccomment">         * @param  args   the arguments for the image.</em>
<a class="jxr_linenumber" name="293" href="#293">293</a> <em class="jxr_javadoccomment">         *</em>
<a class="jxr_linenumber" name="294" href="#294">294</a> <em class="jxr_javadoccomment">         * @return {@code true} if the arguments describe the same object as</em>
<a class="jxr_linenumber" name="295" href="#295">295</a> <em class="jxr_javadoccomment">         *         this one, {@code false} otherwise.</em>
<a class="jxr_linenumber" name="296" href="#296">296</a> <em class="jxr_javadoccomment">         */</em>
<a class="jxr_linenumber" name="297" href="#297">297</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> equals(GraphicsConfiguration config, <strong class="jxr_keyword">int</strong> w, <strong class="jxr_keyword">int</strong> h, Object[] args) {
<a class="jxr_linenumber" name="298" href="#298">298</a>             <strong class="jxr_keyword">return</strong> config == <strong class="jxr_keyword">this</strong>.config &amp;&amp; w == <strong class="jxr_keyword">this</strong>.w &amp;&amp; h == <strong class="jxr_keyword">this</strong>.h &amp;&amp; Arrays.equals(args, <strong class="jxr_keyword">this</strong>.args);
<a class="jxr_linenumber" name="299" href="#299">299</a>         }
<a class="jxr_linenumber" name="300" href="#300">300</a>     }
<a class="jxr_linenumber" name="301" href="#301">301</a> }
</pre>
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